Effect of cysteine using Fenton processes on decolorizing different dyes: a kinetic study

Ferric Oxide Nanomaterials and Plant-Rhizobacteria Symbionts Cogenerate Iron Plaque for Removing Highly Chlorinated Contaminants in Dryland Soils

“…Using a specific cysteine probe, it was observed that the fluorescent intensity in the treatment groups was stronger than that of the control (Figure g), evidencing the induced cysteine generation by α-Fe 2 O 3 NMs and/or JD37. Previous studies have also shown that cysteine could strongly enhance the Fenton reaction by accelerating the redox cycle of ferric and ferrous irons. − So this evidence illustrated the potential role of cysteine in promoting Fe 2+ ion production and the Fenton reaction.…”

Visible-Light-Responsive Nanofibrous α-Fe2O3 Integrated FeOx Cluster-Templated Siliceous Microsheets for Rapid Catalytic Phenol Removal and Enhanced Antibacterial Activity

“…Till now, the Fenton reaction using the Fe 2+ /H 2 O 2 system is still widely employed for wastewater purification. − The produced highly efficient strongly oxidative · OH can directly oxidize organic groups into micromolecular nontoxic H 2 O or CO 2 . Meanwhile, the photo-assisted Fenton-like reaction is more efficient and interesting as compared to the traditional Fenton process because of the more produced oxygen radicals excited by the light radiation.…”

Determination of Activation Energy from Decolorization Reactions of Synthetic Dyes by Fenton Processes Using the Behnajady–Modirshahla–Ghanbary Kinetic Model

“…An appropriate way to evaluate the effect of a reducing compound on Fenton processes is to evaluate the reaction kinetics of experimental data. In several studies by our research group, it was found that the first-order reaction model has been the one that best fits data on dye decolorization reactions by Fenton/reducer processes [20][21][22][23]. In turn, the second-order kinetic model was the one that best adjusted the results of the decolorization of two dyes [21,24].…”

“…To do this, it is necessary to carry out the reaction at different temperatures, calculate the rate constants, and then obtain Ea [33]. In previous works by our research group, when Ea was calculated, the reaction rate constants obtained through classical kinetic models were generally used and best fit the majority of experimental data, being of first-order [20][21][22][23] or second-order [21,24]. As the BMG model also fitted well with much of the experimental data in these studies, the 1/m values could also be used to calculate Ea.…”

“…As a novelty, this work evaluated the activation energy (Ea) from the decolorization of various dyes by Fenton processes (Fe 2+ /H 2 O 2 , Fe 2+ /H 2 O 2 /reducer and Fe 3+ /H 2 O 2 /reducer) using the values of 1/m from the BMG reaction kinetics model [34]. For this purpose, the values of 1/m obtained from previous studies developed by our research group [20][21][22][23][24] were used in the present work. In addition, comparisons were made between Ea values calculated using 1/m and those obtained from the rate constants (k 1 , k 2 ) of conventional kinetic models.…”